Villee, Claude A, et al. <br/><br/>
General zoology 

 - 6 
 -  Sunders College publishing., Philadelphia  1978 
 - 856 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Zoological sciences
<br/><br/><label>Dewey Class. No.: </label>590  VIL-G6